Filter



(No Model.)

J. OSTER, Jr. FILTER.

No. 568,787. Patented Oct. 6, 1896. I

C\ WITNESSES: My INVENTOR 740x, Wkcflfnx, BY' 2% UNITED STATES PATENTOFFICE.

JOHN OSTER, JR, OF NEWPORT, KENTUCKY.

FILTER.

SPECIFICATION forming part of Letters Patent No. 568,787, dated October6, 1896. Application filed October 8,1895. Serial No. 565,027. (Nomodel.)

collected to a detrimental amount. Further-' more, in the constructionof all filters of which I have any knowledge the filtering porousmaterial, if composed of one piece, is always mechanically secured tosome portion of the casing, thereby rendering the removal of the .partsto be cleansed liable to breakage.

In my improved filter I secure freedom of the filtering porous cupinside of the casing by arranging the bottom of the casing so that itmay be easily removed by turning it to one side and then pulling itdownward, thus exposing the cup, which is inverted and rests looselyupon the said bottom or on an elastic packing-ring arranged on thebottom.

The invention will be more clearly understood by reference to thedrawings, in which similar letters indicate corresponding parts.

Figure 1 is a side view of the complete filter. Fig. 2 is a verticalsection through the casing, the filtering-cup, the bottom of the casing,and the elastic packing-rings.

The case or casing A may be composed of metal or other suitablematerial. The bottom B is preferably of metal, and, as herein shown, Ihave provided slots 0 O, that engage lugs D D, which are mechanicallyconnected to the case A and project outward, for the purpose of lockingthe bottom in place outside of the casing.

E is an inverted filtering-cup composed of porous unglazed earthenware.The outer edge of the rim of the cup, as herein shown, is preferablyflanged outward, and as the cup is made so as to allow quite a spacebetween it and the case I place a packing-ring F, composed of elasticmaterial, such as soft rubber,

in the space so provided. The said ring is preferably beveled on itsinner edge to correspond with the flange on the rim of the cup. Theouter edge of the packing-ring preferably corresponds to the inside ofthe casing, against which the said ring rests. The said ring may beallowed to fit loosely in the space a lotted to it and above the flangeof the rim.

I preferably place a second packing-ring G under the edge of the cup toprevent the edge of the cup from coming in contact with the bottomof thecase. It will be observed that the entire arrangement is such that theinner parts are in a free loose state, but when water or any other fluidenters under pressure at the top H of the filter the parts will at onceassume a close relation to each other and the joints will be so tightlypacked by the outward expansion of the elastic packing-ring that nofiuid will be able to pass through any part of the filter except throughthe porous cup and out at the opening I.

I do not limit myself to the exact construction herein shown, as it mayvary widely without departing from the spirit of my invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a filter, the combination of an outer metallic case and its metallicdetachable bottom, each part having a part of the locking arrangementconnected therewith, an inverted cup of porous material, locatedentirely within the said case, an outward projecting flange on the rimof the said cup, and an elastic packing-ring arranged between the outeredge of the said cup and the inner edge of the case, the said ringhaving its inner edge beveled to correspond with and arranged above theflange on the said cup, substantially as set forth.

Signed at Newport, in the county of Campbell and State of Kentucky, this10th day of August, A. D. 1895.

JOHN osrnn, JR.

